Beam-column semi-rigid connection-in-column connection assembly type mixed frame structure

Abstract

The invention belongs to the technical field of civil engineering, and discloses a beam-column semi-rigid connection-column-in-column connection assembly type mixed frame structure which comprises a prefabricated column and a prefabricated beam which are matched with each other and further comprises a beam-column connecting piece, the beam-column connecting piece comprises column end profile steel, and one end of the column end profile steel is fixedly connected with the prefabricated column; one end of the beam end profile steel is fixedly connected with the free end of the column end profile steel through a fixing piece, and the free end of the beam end profile steel is fixedly arranged in the precast beam; according to the scheme, the column end profile steel and the beam end profile steel are matched with the fixing piece to form a semi-rigid joint, through the linear elastic deformation characteristic of the profile steel and the constraint of the fixing piece, the column end profile steel is rigidly and fixedly connected with the prefabricated column, the beam end profile steel is pre-buried in the prefabricated beam to form rigid anchoring, and a plastic hinge is guided to be formed at the beam end; the anti-seismic design target of strong columns and weak beams is achieved from the structural mechanism, and plastic hinges are prevented from being transferred to a column end area; the problem that a beam-column connecting joint cannot deform within a fixed range is solved.

Description

Technical Field

[0001] This solution belongs to the field of civil engineering technology, specifically involving a prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection. Background Technology

[0002] The beam-column prefabricated hybrid frame structure is a prefabricated load-bearing structure formed by combining precast concrete components and steel components. This structure uses beam-column joints as the core force transmission points, transferring bending moments, shear forces, and axial forces through beam-column connections. While ensuring the overall stiffness and load-bearing capacity of the structure, it also allows for rapid assembly construction. In a beam-column frame structure, beam-column joints connect precast beams and columns into a unified whole. These joints play a crucial role in load transfer and seismic energy dissipation, making the connection points of the load-bearing components extremely important in the frame structure.

[0003] See the existing publication (announcement) document CN116220197A, which discloses a beam-column connection node and a prefabricated concrete frame. The beam-column connection node includes a steel sleeve fixedly sleeved on a precast concrete column. A steel connecting beam is welded on the steel sleeve. The steel connecting beam on the steel sleeve is connected to a steel connecting beam with one end pre-embedded in a precast concrete beam by a steel beam connecting assembly with a low yield point. The steel beam connecting assembly is connected to the steel connecting beam by a high-strength friction bolt.

[0004] For example, the aforementioned beam-column connection node, although it can achieve rapid assembly of precast beams and columns, complete the transfer of vertical and horizontal loads, and meet the requirements of conventional stress and construction installation, lacks room for adjustment of node stiffness because the anchor node cannot achieve controllable deformation within a fixed range. It cannot achieve stress distribution between beams and columns through coordinated deformation, nor can it guide the formation of plastic hinges at the beam ends by relying on preset deformation paths. Instead, the excessive stiffness and strong constraints of the node will hinder the normal deformation of the beam ends, which can easily cause plastic hinges to transfer to the column ends or the core area of ​​the node, thereby violating the core seismic design principle of "strong column and weak beam" for frame structures. Summary of the Invention

[0005] This invention provides a prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection to solve the problem that beam-column connection nodes cannot deform within a fixed range.

[0006] This invention provides a prefabricated hybrid frame structure with semi-rigid beam-column connection—column-connection, including prefabricated columns and prefabricated beams that cooperate with each other, and beam-column connectors, wherein the beam-column connectors include: Column end steel, one end of which is fixedly connected to the precast column; The beam-end steel section has one end fixedly connected to the free end of the column-end steel section by a fastener, and the free end of the beam-end steel section is fixedly installed inside the precast beam.

[0007] The principle and effect of this scheme are as follows: the column-end steel and the beam-end steel, together with the fasteners, form a semi-rigid node. Through the linear elastic deformation characteristics of the steel and the constraint of the fasteners, the column-end steel is rigidly connected to the precast column, and the beam-end steel is embedded in the precast beam to form a rigid anchor. The two are connected by the fasteners, so that the rotational stiffness of the node is jointly determined by the bending stiffness of the steel and the connection stiffness of the fasteners. By presetting the cross-section of the steel and the mechanical parameters of the fasteners, the elastic rotation capacity within the fixed range of the node can be set, so that the node can coordinate the relative rotation of the beam and column with controllable deformation under horizontal load, and guide the formation of plastic hinges at the beam ends. From the structural mechanism, the seismic design goal of strong column and weak beam is achieved, and the plastic hinges are prevented from transferring to the column-end area.

[0008] Furthermore, it also includes a load-bearing component, which includes a steel plate and a floor slab. The steel plate is fixed to the top surface of the upper flange of the beam end steel, and the floor slab is fixed to the upper surface of the steel plate.

[0009] The principle and effect of this solution is that prefabricated steel plates and floor slabs can improve assembly efficiency.

[0010] Furthermore, both the steel plate and the floor slab are rectangular structures, and each of the four right-angled ends is provided with a coaxially connected "L"-shaped slot. An "L"-shaped shock-absorbing pad is provided in the slot. One side of the shock-absorbing pad abuts against the junction of the precast column and the precast beam, and the other side abuts against the groove wall of the slot.

[0011] The principle and effect of this scheme are as follows: Since the four corners of the floor slab are all slotted structures, the damping pads only come into direct contact with the junctions of the column-end steel and beam-end steel, allowing the damping pads to absorb energy and resist earthquakes to a certain extent. Most importantly, it avoids direct contact between the floor slab and the column-end steel, thereby preventing the floor slab from constraining the rotation path of the semi-rigid beam-column joint.

[0012] Furthermore, the fastener includes a bolt and a nut, the bolt and nut being threadedly engaged.

[0013] The principle and effect of this solution is to fix one end of the beam-end steel to the free end of the column-end steel using bolts and nuts.

[0014] Furthermore, the beam-column connector also includes a cover plate and a friction plate. The friction plate is located between the column end steel and the cover plate, and both the cover plate and the friction plate have through holes for bolts to pass through. The bolts pass through the through holes and are threadedly connected to the nuts.

[0015] The principle and effect of this scheme are as follows: by using the pre-tightening force of the bolts, the friction plate and the column end steel form a friction surface. In the initial stage of stress, the energy is dissipated and the shear force is borne by the interface friction.

[0016] Furthermore, the flange of the free end of the beam-end steel is fixedly connected to the reinforcing steel in the precast beam; the precast column includes several square steel columns, which are fixed by column connectors.

[0017] The principle and effect of this scheme are as follows: The load at the beam end is transferred to the structural steel, and then to the column end, avoiding stress concentration at the beam end and guiding the formation of plastic hinges at predetermined positions at the beam end. The square steel columns enhance the load-bearing and deformation resistance of the precast columns. The use of internal connectors within the columns enables rigid connections between multiple square steel columns, allowing the precast columns to form an integrated load-bearing system. This ensures that the load is evenly distributed among the square steel columns, dispersing localized stress within the column structure.

[0018] Furthermore, the column connector includes a connecting steel plate and a surrounding steel plate. The connecting steel plate is a cross-shaped connecting steel plate. There are four square steel columns. The four square steel columns are respectively fixedly connected to the outer ends of the four limb plates of the connecting steel plate, and the outer sides of the four square steel columns are fixedly connected to the surrounding steel plate.

[0019] The principle and effect of this scheme are as follows: by using cross-connecting steel plates to position and connect the four square steel columns, the columns form a uniformly stressed grid-shaped overall structure, which allows axial force, bending moment and other loads to be evenly transferred between the steel columns. At the same time, the enclosing steel plates form an external ring constraint on the four square steel columns, which strengthens the overall stress of the columns, thereby improving the overall stiffness, compressive and shear resistance and deformation resistance of the precast columns, and dispersing the local stress of the columns.

[0020] Furthermore, the fastener also includes a spring and a cleaning brush, one end of the spring being fixedly connected to the nut, the free end of the spring being fixedly connected to the cleaning brush, and the bristles of the cleaning brush contacting the bolt.

[0021] The principle and effect of this solution are as follows: Construction sites typically contain impurities such as sand, cement, and dust. During bolt tightening, large dust particles easily adhere to the bolt's thread surface, increasing frictional resistance and causing jamming and uneven force distribution, thus affecting the stability of the joint's force transmission. This solution addresses this by having a cleaning brush move synchronously with the nut during bolt and nut tightening. The brush bristles scrape the bolt's thread surface along its height, cleaning the bolt simultaneously with tightening. Furthermore, dust adheres to the brush bristles during bolt cleaning, reducing its effectiveness. This solution, however, uses a spring-mounted cleaning brush. As the brush rotates around the bolt with the nut, the spring vibrates radially, transmitting this vibration to the brush bristles. This vibration dislodges the dust adhering to the bristles, resulting in self-cleaning of the brush.

[0022] Furthermore, the bristles of the cleaning brush are perpendicular to the central axis of the bolt, and the length of the bristles of the cleaning brush is greater than the radial tooth height of the bolt thread.

[0023] The principle and effect of this solution is to allow the bristles to be perpendicular to the peaks and valleys of the bolt thread, and to combine the bristle length with a length greater than the height of the thread, so that the bristles can adhere to and scrape away dust and impurities from the thread surface and gaps.

[0024] Furthermore, the nut of the bolt has a slot with an open end, the slot cooperating with a cleaning brush, which is inserted into the slot after the nut and bolt are tightened.

[0025] The principle and effect of this solution are as follows: Since the beam-column frame structure in this solution needs to be applied in a seismic environment, the continuous reciprocating vibrations generated by an earthquake will cause gaps to appear between the threads of the bolts and nuts, gradually leading to loosening and affecting the stability of the joint connection. However, if the bolts and nuts are directly welded shut, the threaded connection will become a rigid connection, and the stress during an earthquake will concentrate at the weld, easily causing weld cracks or even damage to the connector. Furthermore, this solution cannot meet the seismic design requirements for controllable deformation of beam-column joints. More importantly, in a seismic environment, the bolts and nuts should be allowed a certain degree of loosening. This loosening displacement can absorb the reciprocating vibration energy from the earthquake, release the stress concentration at the joint, and prevent the huge shear force and axial force generated by the vibration from directly damaging the bolt threads or beam-column connectors, while also preventing the bolts and nuts from dislodging. In this design, after the nut is tightened to the preset locking position, the cleaning brush will smoothly insert into the slot of the nut. The engagement of the cleaning brush with the slot locks the bolt and nut, preventing loosening during non-earthquake conditions and forming a semi-rigid joint. When an earthquake causes the bolt and / or nut to loosen to a certain extent, this loosening will cause the spring connected to the nut to twist and generate an elastic restoring force. At this time, the spring is equivalent to a torsion spring, and the amount of loosening is within the allowable range of the joint's seismic resistance, which will not affect the structural stress. After the vibration stops, the restoring force of the spring will cause the bolt and nut to twist in the opposite direction and return to the initial locking position. This not only solves the problem of bolt and nut loosening under seismic conditions, but also preserves the appropriate deformation capacity of the connection part, adapting to the seismic design requirements of semi-rigid beam-column joints. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the prefabricated hybrid frame structure with semi-rigid beam-column connection and column-in-column connection of the present invention; Figure 2 This is a schematic diagram of the structure of the load-bearing component of the present invention; Figure 3 This is a schematic diagram of the column-end steel and beam-end steel of the present invention; Figure 4 This is a structural schematic diagram of the beam-column connector of the present invention; Figure 5 This is a schematic diagram of the structure of the column connector of the present invention; Figure 6 This is a schematic diagram of the structure of the fastener of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the fastener of the present invention. Figure 2 .

[0027] The reference numerals in the accompanying drawings include: precast column 1, square steel column 11, precast beam 2, beam-column connector 3, column end steel 31, beam end steel 32, cover plate 33, friction plate 34, fastener 35, bolt 351, nut 352, spring 353, cleaning brush 354, slot 355, nut 356, through hole 36, column connector 4, connecting steel plate 41, enclosing steel plate 42, load-bearing component 5, steel plate 51, floor slab 52, slot 53, shock absorber 54, shear bolt 55. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] The following is in conjunction with the appendix Figure 1-7 A prefabricated hybrid frame structure with semi-rigid beam-column connection and column-in-column connection according to an embodiment of the present invention is described in detail, including a prefabricated column 1, a prefabricated beam 2, a beam-column connector 3, a column-in-column connector 4, and a load-bearing component 5.

[0032] Please see Figure 1 and Figure 5The precast column 1 and the precast beam 2 are semi-rigidly connected by beam-column connectors 3. The precast column 1 adopts a steel-concrete composite column structure, with four square steel columns 11 inside. The four square steel columns 11 are evenly distributed in a grid pattern. A column connector 4 is set in the middle of the column to achieve rigid connection and coordinated stress of the four square steel columns 11. The column connector 4 includes a connecting steel plate 41 and a surrounding steel plate 42. The connecting steel plate 41 is a cross-shaped steel structure. Its four outer ends are fixed to the inner sidewalls of the four square steel columns 11 by carbon dioxide gas shielded welding, so that the four square steel columns 11 form a uniformly stressed overall structure, allowing axial force, bending moment and other loads to be evenly transferred between the four steel columns 11 and dispersing the local stress of the column. The surrounding steel plate 42 is a square frame structure, which fits and wraps around the outer sidewalls of the four square steel columns 11 and is welded and fixed to the square steel columns 11, forming an external ring constraint for the four square steel columns 11, further strengthening the integrity and deformation resistance of the column. High-strength concrete is poured into the precast column 1 to form a steel-concrete composite structure, which improves the compressive strength, shear strength and overall stiffness of the precast column 1, and meets the seismic design requirements of strong column and weak beam. The shear force at the connection position in the column is borne by four enclosing steel plates 42. Each enclosing steel plate 42 is connected to the square steel column 11 through two vertical welds, corresponding to the root of the upper column and the top of the lower column, respectively. The height of the enclosing steel plate 42 is determined by the weld bearing capacity calculation to ensure the structural strength of the connection in the column.

[0033] Please see Figure 1 and Figure 2The load-bearing component 5 includes a steel plate 51, a floor slab 52, a slot 53, a shock-absorbing pad 54, and shear studs 55. In this embodiment, the steel plate 51 is a prefabricated open-type profiled steel plate. Its cross-sectional wave height and plate thickness are calculated and determined according to the floor load design value. The planar outline dimensions of the steel plate 51 are adapted to the dimensions of the single-span rectangular column grid unit, so that it can completely cover the area enclosed by the adjacent precast columns 1 and precast beams 2. Steel plate 51 is laid on the top surface of the upper flange of beam end steel 32 and fixed to the precast beam 2 and the upper flange of beam end steel 32 by welding. Floor slab 52 is cast-in-place with C60 self-compacting concrete and fixed to the upper surface of steel plate 51 by shear studs 55. The rod of shear stud 55 extends upward into the interior of floor slab 52, forming a shear connection between steel plate 51, beam end steel 32 and floor slab 52 to avoid slippage and misalignment under horizontal load. The concrete pouring height is determined according to the designed floor slab thickness, so that floor slab 52 and steel plate 51 form an integrated composite floor slab structure. At the joints of multi-span continuous floor slabs, C60 self-compacting concrete of the same grade is used for filling and splicing to ensure the integrity and waterproof performance of the floor. Both the steel plate 51 and the floor slab 52 have L-shaped slots 53 at their four right-angle ends, which are coaxial and extend completely along the thickness of the plate. The positions of the L-shaped slots 53 correspond one-to-one with the positions of the precast columns 1 and beam-column joints at the four corners. The inner contour of the slot is larger than the outer contour of the column end steel 31, forming a clearance space. Each L-shaped slot 53 contains an L-shaped shock-absorbing pad 54. The L-shaped shock-absorbing pad 54 is made of high-elasticity vibration-damping rubber, and its shape is perfectly matched with the inner contour of the L-shaped slot 53 and the right-angled outer contour at the junction of the column end steel 31 and the beam end steel 32. The height of the shock-absorbing pad along the thickness of the plate matches the through height of the L-shaped slot 53. During on-site assembly and construction, after the precast columns 1, precast beams 2 and beam-column connectors 3 are assembled and fixed, L-shaped shock-absorbing pads 54 are first installed at the junction of the column end steel 31 and beam end steel 32 at the four beam-column nodes. Then, the precast open-type profiled steel sheet 51 is hoisted onto the precast beam 2 and aligned with the beam-column nodes through the four corner slots 53. The shock-absorbing pads 54 are clamped between the slot wall of the slot 53 and the junction of the beam and column, completing the rapid pre-positioning of the steel sheet 51. Then, the floor slab 52 is installed on the upper surface of the steel sheet 51 and the steel sheet and floor slab 52 are fixed by shear studs 55.

[0034] Please see Figure 4The beam-column connector 3 includes column end steel 31, beam end steel 32, cover plate 33, friction plate 34, and fastener 35. Both column end steel 31 and beam end steel 32 are made of I-beam profiles, and their cross-sectional dimensions are compatible. The moment of inertia of the steel section is determined based on the bending stiffness of the precast beam 2 section, so that the bending stiffness of the steel section at the beam-column joint is consistent with that of the precast beam 2 section. By utilizing the characteristics of semi-rigid connection, the joint area is made into a weak section, thereby achieving the purpose of beam end weakening. One end of the column-end steel section 31 is fixedly welded to the end of the precast column 1; the free end of the beam-end steel section 32 is pre-embedded inside the precast beam 2, and the flange of the free end of the beam-end steel section 32 is welded and fixed to the reinforcing steel inside the precast beam 2, so that the beam-end steel section 32 and the precast beam 2 form an integrated force-bearing system, which can more evenly transfer the shear force and bending moment at the beam end to the steel section, and then transmit it to the column end through the node, avoiding stress concentration at the beam end, thereby guiding the plastic hinge to form at the preset position at the beam end. The depth of the beam-end steel section 32 inserted into the precast beam 2 is determined by calculation based on the design values ​​of the bending moment and shear force at the beam end, ensuring the bond strength between the steel section and the concrete and the safety of local bearing pressure. The extension length of the column-end steel section 31 is calculated based on parameters such as the node design rotation angle and the design value of the tensile strength of bolt 351, so that bolt 351 and steel section do not fail when the node reaches the design rotation angle. The free end of the column end steel 31 and the connecting end of the beam end steel 32 are fitted together. The cover plate 33 is set on the side of the column end steel 31 away from the beam end steel 32. The friction plate 34 is sandwiched between the column end steel 31 and the cover plate 33. The column end steel 31, the friction plate 34 and the cover plate 33 are all provided with corresponding through holes 36. The fastener 35 passes through the through holes 36 to realize the fixed connection of the column end steel 31, the friction plate 34 and the cover plate 33, thereby completing the connection between the column end steel 31 and the beam end steel 32.

[0035] Please see Figure 4 , Figure 6 and Figure 7Specifically, the fastener 35 includes a bolt 351, a nut 352, a spring 353, and a cleaning brush 354. The bolt 351 passes through the through holes 36 of the cover plate 33, the friction plate 34, and the column end steel 31 in sequence, and then engages with the nut 352 to achieve a tight connection. The preload of the bolt 351 creates a friction surface between the friction plate 34 and the column end steel 31. In the initial stage of stress, the interface friction dissipates seismic energy and bears shear force. Combined with the linear elastic deformation characteristics of the steel, the rotational stiffness of the node is determined by the bending stiffness of the steel, the connection stiffness of the bolt 351, and the frictional stiffness of the friction plate 34. This further regulates the rotational stiffness of the node, achieving controllable deformation of the node within a fixed range. In this invention, the beam-column linear stiffness ratio is controlled within the range of 1.0 to 2.0. The beam-column dimensions are determined by calculating the elastic modulus, moment of inertia, and calculated length of the beam and column materials, so that the bending moment at the frame node is reasonably distributed between the beam and column. The diameter of the through hole 36 is larger than the diameter of the spring 353, so that the spring 353 can pass smoothly through the through hole 36. One end of the spring 353 is fixedly connected to the side wall of the nut 352, and the free end of the spring 353 is fixedly connected to the cleaning brush 354. The bristles of the cleaning brush 354 are set perpendicular to the central axis of the bolt 351. The bristles of the cleaning brush 354 are in close contact with the thread surface of the bolt 351, and the length of the bristles needs to be set to be greater than the radial tooth height of the bolt 351, so that the bristles can be perpendicular to the tooth peaks and valleys of the bolt 351 thread and penetrate into the thread gap to form a fully fitted scraping contact. During the tightening process of bolt 351 and nut 352, impurities such as sand, cement, and dust at the construction site easily adhere to the threaded surface of bolt 351, increasing the frictional resistance during tightening, leading to jamming and uneven force. The cleaning brush 354 moves synchronously with the nut 352, causing the bristles to scrape the threaded surface of bolt 351 along its height direction, thus synchronizing the tightening and cleaning of bolt 351 and removing dust and impurities from the threaded surface and gaps. Simultaneously, as the cleaning brush 354 rotates around bolt 351 with the nut 352, the spring 353 vibrates due to the tightening. This vibration is transmitted to the bristles of the cleaning brush 354, causing the dust adhering to the bristles to detach, achieving self-cleaning of the cleaning brush 354. This prevents dust accumulation from clogging the bristles and ensures the cleaning effect of the cleaning brush 354. It should be noted that since the column end steel 31, beam end steel 32, cover plate 33 and friction plate 34 are set perpendicular to the ground, the dust will fall downwards after the cleaning brush cleans the bolt 351. Also, since the nut 352 will be screwed into the already cleaned bolt 351 area after cleaning, it will not re-enter the already cleaned bolt 351 area.

[0036] Please continue reading. Figure 4 , Figure 6 and Figure 7The nut 356 of bolt 351 has an open slot 355 on the side facing the cleaning brush 354. The shape of the slot 355 is adapted to the cleaning brush 354. After the nut 352 and bolt 351 are screwed to the preset locking position, the cleaning brush 354 will smoothly insert into the slot 355. The engagement and limiting of the cleaning brush 354 and slot 355 achieves the initial locking of bolt 351 and nut 352, preventing bolt 351 and nut 352 from accidentally loosening in non-vibration conditions. It should be noted that when the nut 356 contacts the cleaning brush 354, a reverse pushing force is generated, which compresses the spring 353. The cleaning brush 354 will only move in the opposite direction and will not cause the cleaning brush 354 to jam. This structure is applied in seismic environments. The continuous reciprocating vibrations generated by an earthquake will cause dynamic shear forces and axial loosening forces on the threaded contact surfaces of bolt 351 and nut 352. Allowing the bolt 351 and nut 352 to loosen slightly allows the reciprocating vibration energy from the earthquake to be absorbed through a small displacement, releasing stress concentration at the joint and preventing the rigid connection from being directly damaged by the enormous force generated by the vibration. Furthermore, this loosening amount is within the seismic tolerance range of the joint and will not affect the structural load. Simultaneously, the engagement and limiting action of the cleaning brush 354 and slot 355 effectively restricts the dislocation of bolt 351 and nut 352, preventing connection failure and breakage of the force transmission path at the joint. Most importantly, when bolt 351 and nut 352 loosen, the spring 353 connected to nut 352 will twist and generate an elastic restoring force (at this time, spring 353 is equivalent to a torsion spring). After the earthquake vibration stops, the restoring force of spring 353 will cause bolt 351 and nut 352 to twist in the opposite direction, so that they return to their initial locked position. This not only solves the problem of loosening of bolt 351 and nut 352 in seismic environment, but also retains the appropriate deformation capacity of the connection part, which is suitable for the seismic design requirements of semi-rigid beam-column joints.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection, comprising prefabricated columns (1) and prefabricated beams (2) that cooperate with each other, characterized in that, It also includes a beam-column connector (3), which comprises: Column end steel (31), one end of which is fixedly connected to the precast column (1); Beam end steel (32), one end of which is fixedly connected to the free end of column end steel (31) by a fastener (35), and the free end of the beam end steel (32) is fixedly installed inside the precast beam (2).

2. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 1, characterized in that: It also includes a load-bearing component (5), which includes a steel plate (51) and a floor slab (52). The steel plate (51) is fixed on the top surface of the upper flange of the beam end steel (32), and the floor slab (52) is fixed on the upper surface of the steel plate (51).

3. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 2, characterized in that: The steel plate (51) and the floor slab (52) are both rectangular structures, and each of the four right-angled ends is provided with a coaxial through "L"-shaped slot (53). The slot is provided with an "L"-shaped shock-absorbing pad (54). One side of the shock-absorbing pad (54) abuts against the junction of the precast column (1) and the precast beam (2), and the other side abuts against the groove wall of the slot (53).

4. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 1, characterized in that: The fastener (35) includes a bolt (351) and a nut (352), wherein the bolt (351) and the nut (352) are threaded together.

5. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 4, characterized in that: The beam-column connector (3) also includes a cover plate (33) and a friction plate (34). The friction plate (34) is located between the column end steel (31) and the cover plate (33). Both the cover plate (33) and the friction plate (34) have through holes (36) for bolts (351) to pass through. The bolts (351) pass through the through holes (36) and are threadedly connected to the nuts (352).

6. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 1, characterized in that: The flange of the free end of the beam end steel (32) is fixedly connected to the steel bars in the precast beam (2); the precast column (1) includes several square steel columns (11), and the several square steel columns (11) are fixed by column connectors (4).

7. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 6, characterized in that: The column connector (4) includes a connecting steel plate (41) and a surrounding steel plate (42). The connecting steel plate (41) is a cross-shaped connecting steel plate (41). There are four square steel columns (11). The four square steel columns (11) are fixedly connected to the outer ends of the four limb plates of the connecting steel plate (41) respectively, and the outer sides of the four square steel columns (11) are fixedly connected to the surrounding steel plate (42).

8. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 4, characterized in that: The fastener (35) also includes a spring (353) and a cleaning brush (354). One end of the spring (353) is fixedly connected to the nut (352), and the free end of the spring (353) is fixedly connected to the cleaning brush (354). The bristles of the cleaning brush (354) are in contact with the bolt (351).

9. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 8, characterized in that: The bristles of the cleaning brush (354) are perpendicular to the central axis of the bolt (351), and the length of the bristles of the cleaning brush (354) is greater than the radial tooth height of the thread of the bolt (351).

10. The prefabricated hybrid frame structure with semi-rigid beam-column connection and column-interconnection as described in claim 9, characterized in that: The nut (356) of the bolt (351) has a slot (355) with one end open. The slot (355) is used to engage with a cleaning brush (354), which is inserted into the slot (355) after the nut (352) and bolt (351) are tightened.

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